Feng Jun tested the "Footprint" in the Earth Plane, taking Keane from Mai Nation back to Huaxia, and the person didn't die.
Of course, at that time, Keane was basically close to dying, and Feng Jun could not determine if his teleportation process harmed him — or rather, how much harm it caused?
He was eager to find a healthy person in the Earth Plane to try it out, but... that would be human experimentation, a violation of ethical principles.
However, his heart for experimentation didn't die, instead, it was lively and jumping.
Especially when he saw Kong Ziyi fail in soul searching, and the other party's brain directly exploded, she even said, "I was just experimenting," he thought, as a member of the Earth Realm, shouldn't there be an experimental spirit too?
Moreover, now Mount Zhige was in chaos, waiting to be rectified, with no shortage of lab rats.
